Baja California slider

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Baja California slider
Not evaluated (IUCN 2.3)[1]
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Suborder: Cryptodira
Family: Emydidae
Genus: Trachemys
T. nebulosa
Binomial name
Trachemys nebulosa
Trachemys nebulosa nebulosa
  • Chrysemys nebulosa Van Denburgh, 1895
  • Chrysemys ornata nebulosa Siebenrock, 1909
  • Pseudemys ornata nebulosa Stejneger & Barbour, 1917
  • Pseudemys nebulosa Van Denburgh & Slevin, 1921
  • Pseudemys scripta nebulosa Carr, 1942
  • Chrysemys scripta nebulosa Smith & Taylor, 1966
  • Trachemys scripta nebulosa Iverson, 1985
  • Trachemys dorbigni nebulosa Obst, 1996
  • Trachemys ornata nebulosa Walls, 1996
  • Trachemys nebulosa Wilms, 1999
  • Trachemys nebulosa nebulosa Bringsøe, 2001
Trachemys nebulosa hiltoni
  • Pseudemys scripta hiltoni Carr, 1942
  • Pseudemys concinna hiltoni Wermuth & Mertens, 1961
  • Chrysemys scripta hiltoni Smith & Taylor, 1966
  • Chrysemys gaigeae hiltoni Weaver & Rose, 1967
  • Trachemys scripta hiltoni Iverson, 1985
  • Trachemys ornata hiltoni Walls, 1996
  • Trachemys nebulosa hiltoni Bringsøe, 2001

The Baja California slider (Trachemys nebulosa)[1] is turtle belonging to the genus Trachemys of the family Emydidae. It is native to Baja California, Sinaloa and Sonora in Mexico.[1]


The Baja California Slider, also known as the Black-bellied Slider, is a medium sized turtle and identified for their clawed digits, non-elephantine hind limbs and a wide-colored suborbital patch. They have smooth shells, rounded posteriorly and straight interiorly. These shells are longer than they are wide, have a low later profile and can reach up to 37 cm (14.5 inches) in length. On the ventral side of the shell is yellow with symmetrical black markings. Dorsally the shell is dark in color with the vertebral, costal and marginal scutes having dark black spots surrounded by lighter margins. The Baja California Slider has a large, triangular shaped head which is covered by smooth skin. They have protruding non-hooked snouts where the nostrils are located decently high and large eyes.  The top of the head is olive colored with indistinct pale lines while the chin and throat are lighter with central yellow markings; there is a pair of yellow stripes that extend anteriorly across the local jaw and onto the upper jaw. Their tails are moderately long while male’s tails being longer than females. The bodies are covered with multiple yellow stripes including the forelimbs, not the hind limbs.[3]

Habitat and Activity[edit]

They prefer larger bodies of water with muddy bottoms, often seen basking on emerged rocks or floating logs. Most activity takes place between mid-March and October as well as the winter months by burying themselves into the mud.[3]


The Baja California Slider has an exceedingly limited geographic range, currently found from San Ignacio southward into Baja California Sur. They were endemic only to the San José Rio basin in the greater Cabo San Lucas area (where they are now exceedingly rare due to over fishing) but as early as the late 1700’s they were transported northwards by natives to provide a continuing food source. They are still consumed today in the remote areas of Baja by native people. Although they are extremely wary of humans being very difficult to approach and are high maintenance, they make good house pets.[3]


  • Trachemys nebulosa nebulosa – from Baja California.[1]
  • Trachemys nebulosa hiltoni Fuerte slider – from Sinaloa and Sonoro.[1]


  1. ^ a b c d e f Rhodin 2010, p. 000.103
  2. ^ Fritz Uwe; Peter Havaš (2007). "Checklist of Chelonians of the World" (PDF). Vertebrate Zoology. 57 (2): 206. Archived from the original (PDF) on 2010-12-17. Retrieved 29 May 2012.
  3. ^ a b c Snow, John. "Baja California Slider Turtle, Trachemys nebulosa nebulosa". Mexican-Fish.